As first, I thought someone had reported it, but after some searching, I don't see anyone report about it so ofc I have to report.

As said, the trial chambers' dispenser loot chests are not the same as the jungle temples' dispenser loot chests. Specifically the jungle temple's dispenser loot chest is "minecraft:chests/jungle_temple_dispenser" and the trial chambers' dispenser loot chest are "minecraft:dispenser/trial_chamber/chamber", "minecraft:dispenser/trial_chamber/corridor" and "minecraft:dispenser/trial_chamber/water". It should be "minecraft:dispenser/jungle_temple" or "minecraft:chests/trial_chamber/chamber_dispenser", "minecraft:chests/trial_chamber/corridor_dispenser" and "minecraft:chests/trial_chamber/water_dispenser" or something like that.

To reproduce, just type in the chat: "/loot give @a loot dis", then you will see the inconsistency.